Hey brains trust, I have a fridge that is not really normal for a yacht, it seems to be a bit more like a commercial fridge. So before I call a fridge guy I was hoping that someone where may have come across these pressure switches and how to set it.

I dont like the system and if money was not an object then I would replace it with something different. However we live in reality. So a brief run down of the system:
Runs on 240v, has one compressor and a water cooler for the refrigerant (not keel cooler). There are 2 eutetic plates in each compartment (fridge & freezer) and air does not flow between the compartments. I have recently replaced door seals in an attempt to make it more efficient. The 2 eutetic plates are at the back of the compartments and the difference between each compartment is just the refrigerant type. The system has only 1 control for both with changes in this effecting changes in both the fridge and freezer.

Since we have had the boat I think it cycles too much for a eutetic system based on talking to others with more traditional (Ozefridge) systems. With the settings that we are at, the fridge cycles for 20-25 minutes every 90 minutes. I have a couple of temperature sensors in the compartments and they are placed next to the plates. The fridge is currently reading 3 and the freezer -10. We would like them both a bit cooler as the freezer doesent actually freeze stuff so we are throwing out food. I know this is a catch 22 with upping the temperature meaning it will cycle more. I think that I need to increase the differential between when it kicks in and when it cuts out, but I am not sure how to do this.

Obviously we also only open it when we have to and try to keep it as full as possible etc etc

Here is a photo of the controls